dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/InMemoryDOMDataTreeShardChangePublisher.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.mdsal.dom.store.inmemory;
  10
  11 import com.google.common.collect.ImmutableList;
  12 import java.util.Collection;
  13 import java.util.Map;
  14 import java.util.concurrent.ExecutorService;
  15 import javax.annotation.Nonnull;
  16 import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
  17 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  18 import org.opendaylight.mdsal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
  19 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager;
  20 import org.opendaylight.yangtools.util.concurrent.QueuedNotificationManager.Invoker;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  22 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  24 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  25 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 final class InMemoryDOMDataTreeShardChangePublisher extends AbstractDOMShardTreeChangePublisher {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(InMemoryDOMDataTreeShardChangePublisher.class);
  32
  33     private static final Invoker<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> MANAGER_INVOKER =
  34             (listener, notification) -> {
  35                 final DOMDataTreeChangeListener inst = listener.getInstance();
  36                 if (inst != null) {
  37                     inst.onDataTreeChanged(ImmutableList.of(notification));
  38                 }
  39             };
  40
  41     private final QueuedNotificationManager<AbstractDOMDataTreeChangeListenerRegistration<?>, DataTreeCandidate> notificationManager;
  42
  43     InMemoryDOMDataTreeShardChangePublisher(final ExecutorService executorService,
  44                                             final int maxQueueSize,
  45                                             final DataTree dataTree,
  46                                             final YangInstanceIdentifier rootPath,
  47                                             final Map<DOMDataTreeIdentifier, ChildShardContext> childShards) {
  48         super(dataTree, rootPath, childShards);
  49         notificationManager = new QueuedNotificationManager<>(executorService, MANAGER_INVOKER, maxQueueSize, "DataTreeChangeListenerQueueMgr");
  50     }
  51
  52     @Override
  53     protected void notifyListeners(@Nonnull final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations,
  54                                    @Nonnull final YangInstanceIdentifier path,
  55                                    @Nonnull final DataTreeCandidateNode node) {
  56         final DataTreeCandidate candidate = DataTreeCandidates.newDataTreeCandidate(path, node);
  57
  58         for (final AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
  59             LOG.debug("Enqueueing candidate {} to registration {}", candidate, registrations);
  60             notificationManager.submitNotification(reg, candidate);
  61         }
  62     }
  63
  64     @Override
  65     protected void registrationRemoved(@Nonnull AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
  66         LOG.debug("Closing registration {}", registration);
  67
  68     }
  69
  70     public <L extends DOMDataTreeChangeListener> AbstractDOMDataTreeChangeListenerRegistration<L> registerTreeChangeListener(YangInstanceIdentifier path, L listener) {
  71         return super.registerTreeChangeListener(path, listener);
  72     }
  73
  74     synchronized void publishChange(@Nonnull final DataTreeCandidate candidate) {
  75         processCandidateTree(candidate);
  76     }
  77 }